Drug interactions
Gemifloxacin + Procainamide
Severity: Major
Gemifloxacin and Procainamide: major interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Procainamide is a class IA antiarrhythmic known to prolong QT and cause torsades de pointes. Adding gemifloxacin raises the risk of life-threatening arrhythmia.
What this interaction means in plain words
Gemifloxacin and Procainamide can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Why it happens
Additive pharmacodynamic QT prolongation through potassium channel blockade.
What to do
Avoid the combination and select a non-QT-prolonging antibiotic. If unavoidable, monitor ECG and electrolytes and consider procainamide levels.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Gemifloxacin
- Arsenic trioxide + Gemifloxacin Contraindicated
- Dofetilide + Gemifloxacin Contraindicated
- Gemifloxacin + Ibutilide Contraindicated
- Gemifloxacin + Pimozide Contraindicated
- Gemifloxacin + Thioridazine Contraindicated
- Gemifloxacin + Vandetanib Contraindicated
Frequently asked questions
Can I take Gemifloxacin with Procainamide?
MediHelp rates the interaction as major. Gemifloxacin and Procainamide can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Procainamide is a class IA antiarrhythmic known to prolong QT and cause torsades de pointes. Adding gemifloxacin raises the risk of life-threatening arrhythmia.
How serious is the interaction between Gemifloxacin and Procainamide?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination and select a non-QT-prolonging antibiotic. If unavoidable, monitor ECG and electrolytes and consider procainamide levels.
What other medicines interact with Gemifloxacin?
MediHelp also lists interactions of Gemifloxacin with, for example, Arsenic trioxide, Dofetilide, Ibutilide. The full list is on the Gemifloxacin page.
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